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enzyme activity
Blockers of GABAA-ergic receptors, picrotoxin (50 μM) and bicuculline (5 μM), canceled the combined effect of diazepam and GABA on the enzyme activity.
      
The enzyme activity was determined as the rate of linoleic acid oxidation by the protein fraction isolated from the control and irradiated thymocytes under standard conditions.
      
The presence of an activator ion as well as extended duration of the microsomal fraction pretreatment with nickel nitrate (2.5 h) did not increase its effect on the enzyme activity.
      
Furosemide (0.1-0.5 mM) removed the activating effect of the mediator on chloride transport and enzyme activity (I50 equaled 0.16 and 0.12 mM, respectively).
      
A considerable increase in superoxide dismutase activity was observed at the initial stages of infection, later the enzyme activity decreased and this decrease was timed to cessation of feeding and development of sepsis in the infected larvae.
      
Changes in the enzyme activity in the organs of larvae infected with a highly virulent strain of B.
      
The chemical composition of the aqueous extract and the ionic composition of the soil absorption complex changed, the base exchange capacity decreased, the humus state deteriorated, and enzyme activity was suppressed.
      
Assays for potential enzyme activity demonstrated that most of the strains tested were active at high temperature.
      
The revealed differences in kinetic parameters of the brain enzyme activity are considered in terms of different biochemical adaptation in ringed seal and beluga.
      
Effect of entomopathogenic fungi on detoxification enzyme activity in greater wax moth Galleria mellonella L.
      
The enzyme activity depended on the drainage depth.
      
However, in the presence of the proximal 5"-terminus restricting the template, the enzyme activity significantly increased.
      
Optimal endoglycosidase activity of the native enzyme was observed at 0.15 M NaCl and pH 5.5 and electrostatic interactions influenced the enzyme activity.
      
Administration of thyroxin caused initial redistribution of the enzyme activity between template-bound and free fractions accompanied by the increase of template bound RNA-polymerases.
      
It is concluded that enzyme molecules within oligomeric complexes are affected by extrinsic signals that result in change of enzyme activity, whereas the individual (protomeric) state is insensitive to these signals.
      
We suggest that protein aggregation as well as the changes in protein composition and/or in properties of lipid bilayer SR membranes can result in the decrease of enzyme activity during hibernation.
      
The enzyme activity in RS1 tumor was not revealed.
      
The enzyme activity was 35.5% increased by low concentrations of L-arginine (≤10-5 M) and its activity was 32.3-37.1% decreased at the L-arginine concentrations of 10-4-10-3 M.
      
An optical isomer of L-arginine, D-arginine, at the concentrations of ≤10-5 M also increased the enzyme activity by 37.1%, but its inhibiting effect was much less pronounced and was 15.7% at the D-arginine concentration of 10-3 M.
      
The enzyme activity was sensitive to inhibition by iodoacetamide and p-chloromercuribenzoate but resistant to EDTA, pepstatin, and phenylmethylsulfonyl fluoride.
      
 

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